India's 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam achieved criticality on April 8, 2026, marking a major milestone in its three-stage nuclear program. The IEA hailed the achievement as a step towards a closed fuel cycle and enhanced energy security. The sodium-cooled reactor can produce more fuel than it consumes and utilizes thorium.

India's 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam achieved criticality on April 8, 2026, marking a major milestone in its three-stage nuclear program. The IEA hailed the achievement as a step towards a closed fuel cycle and enhanced energy security. The sodium-cooled reactor can produce more fuel than it consumes and utilizes thorium. 

Key Details of the PFBR Achievement:
Significance: -
This accomplishment marks the transition into the second stage of India’s nuclear program, utilizing fast breeder technology to create a closed fuel cycle.
Technological Feat:-
 The reactor is designed to produce more fuel than it consumes, which allows for better utilization of India's large thorium reserves.
Energy Future:-
 The successful operation of this indigenously designed reactor positions India among a few select nations with advanced fast breeder technology.
IEA and Global Recognition: -
The International Energy Agency lauded the event, acknowledging it as a crucial step toward reducing dependence on conventional fuels.
Next Steps: The PFBR, located at Kalpakkam, is expected to strengthen India's long-term energy security strategy. 
MJF Lion ER YK Sharma 

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